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Finding the Fourth Proportional to 103,608.40, 155,566.20 and 80,261.20

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Solution

The fourth proportional to 103,608.40, 155,566.20 and 80,261.20 is: 120,510.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,608.40 : 155,566.20 = 80,261.20 : x
  2. Step 2: Convert to fraction form
    103,608.40/155,566.20 = 80,261.20/x
  3. Step 3: Cross multiply
    103,608.40x = 155,566.20 × 80,261.20
  4. Step 4: Simplify right side
    103,608.40x = 12,485,929,891.44
  5. Step 5: Solve for x
    x = 12,485,929,891.44/103,608.40
  6. Step 6: Final answer
    x = 120,510.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.